CVE-2026-6245: Red Hat Enterprise Linux 10 · Buffer Access with Incorrect Length Value
Affects Red Hat Enterprise Linux 10Source CVE Database V5
Not known to be exploited · CVSS 5.5 Medium.
Data as of 29 Oct 2026, 19:04 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 15 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10sssd | Affected– | Fixed in– |
| Red Hat Enterprise Linux 6sssd | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7sssd | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8sssd | Affected– | Fixed in– |
| Red Hat Enterprise Linux 9sssd | Affected– | Fixed in– |
| Red Hat OpenShift Container Platform 4openshift/ose-rhel-coreos-8 | Affected– | Fixed in– |
AI-suggested
Until an official fix is available, consider restricting local access to systems running Red Hat Enterprise Linux 10 and monitor for unusual authentication failures related to SSSD. No vendor advisory content explicitly states that no action is required or that the issue is already mitigated.
Description
A flaw was found in the System Security Services Daemon (SSSD). The pam_passkey_child_read_data() function within the PAM passkey responder fails to properly handle raw bytes received from a pipe. Because the data is treated as a NUL-terminated C string without explicit termination, it results in an out-of-bounds read when processed by functions like snprintf(). A local attacker could potentially trigger this vulnerability by initiating a crafted passkey authentication request, causing the SSSD PAM responder to crash, resulting in a local Denial of Service (DoS).